Introduction
Emulator is a software that allows you to run an operating system on another operating system. For example, you can run iOS on your macOS or Windows using an emulator. You can also run Android on your macOS or Windows using an emulator.
iOS Emulator
How to open emulator for iOS
open -a Simulator
How to list all available emulators for iOS
xcrun simctl list devices
Android Emulator
How to open emulator for Android
emulator -avd <emulator_name>
How to list all available emulators for Android
emulator -list-avds